diff --git a/README.md b/README.md
index a643b558ca06bb0d9cba762b8191b45382e2c09d..682788286246c735559fe63915ff4913c2e2f560 100755
--- a/README.md
+++ b/README.md
@@ -130,7 +130,7 @@ Initialize FlutterBoost with FLBPlatform at the beginning of your App.
 
 ```objc
  [FlutterBoostPlugin.sharedInstance startFlutterWithPlatform:router
-                                                        onStart:^(FlutterViewController *fvc) {
+                                                        onStart:^(id engine) {
                                                             
                                                         }];
 ```
diff --git a/README_CN.md b/README_CN.md
index df17ea706410048c401ea6320c16808dd91b2ff5..0043cf896ffe54b39d93a4b5875e6dbb1ed7a964 100755
--- a/README_CN.md
+++ b/README_CN.md
@@ -123,7 +123,7 @@ class _MyAppState extends State<MyApp> {
 
 ```çš„ObjectiveC
  [FlutterBoostPlugin.sharedInstance startFlutterWithPlatform:router
-                                                        onStart:^(FlutterViewController * fvc){
+                                                        onStart:^(id engine){
                                                             
                                                         }];
 ```
diff --git a/ios/Classes/1.5/FLB2FlutterApplication.m b/ios/Classes/1.5/FLB2FlutterApplication.m
index 12c2654cfba8f4c67edbd9a1a64195c1fc880328..4cded78addbfa31bd46b2eceec506ccbc3983620 100755
--- a/ios/Classes/1.5/FLB2FlutterApplication.m
+++ b/ios/Classes/1.5/FLB2FlutterApplication.m
@@ -76,13 +76,24 @@
         _manager = [FLB2FlutterContainerManager new];
         _pageResultCallbacks = NSMutableDictionary.new;
         _callbackCache = NSMutableDictionary.new;
+        
+        [[NSNotificationCenter defaultCenter] addObserver:self
+                                                 selector:@selector(applicationWillEnterForeground:)
+                                                     name:UIApplicationWillEnterForegroundNotification
+                                                   object:nil];
+        
+        [[NSNotificationCenter defaultCenter] addObserver:self
+                                                 selector:@selector(applicationDidEnterBackground:)
+                                                     name:UIApplicationDidEnterBackgroundNotification
+                                                   object:nil];
     }
     return self;
 }
 
 - (void)dealloc
 {
-    [[NSNotificationCenter defaultCenter] removeObserver:self];
+    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationWillEnterForegroundNotification object:nil];
+    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidEnterBackgroundNotification object:nil];
 }
 
 - (UIView *)flutterView
@@ -90,6 +101,13 @@
     return [self flutterViewController].view;
 }
 
+- (void)applicationDidEnterBackground:(UIApplication *)application {
+    [self.viewProvider didEnterBackground];
+}
+
+- (void)applicationWillEnterForeground:(UIApplication *)application {
+    [self.viewProvider willEnterForeground];
+}
 
 - (BOOL)contains:(id<FLBFlutterContainer>)vc
 {
diff --git a/ios/Classes/1.5/FLB2FlutterEngine.m b/ios/Classes/1.5/FLB2FlutterEngine.m
index 82b1d612d464f3dbb8e75b630b8f2b24f98c45b5..e0bf2c6cc3dc9c0f09944eca0abc1bdaa60295ee 100755
--- a/ios/Classes/1.5/FLB2FlutterEngine.m
+++ b/ios/Classes/1.5/FLB2FlutterEngine.m
@@ -25,6 +25,7 @@
 #import "FLB2FlutterEngine.h"
 #import <Flutter/Flutter.h>
 #import "FLB2FlutterViewContainer.h"
+#import "BoostMessageChannel.h"
 
 
 @interface FLB2FlutterEngine()
@@ -87,6 +88,17 @@
 }
 
 
+- (void)didEnterBackground
+{
+    [BoostMessageChannel sendEvent:@"background"
+                         arguments:nil];
+}
+
+- (void)willEnterForeground
+{
+    [BoostMessageChannel sendEvent:@"foreground"
+                         arguments:nil];
+}
 
 - (FlutterEngine *)engine
 {
diff --git a/ios/Classes/Boost/FLB2FlutterProvider.h b/ios/Classes/Boost/FLB2FlutterProvider.h
index 2771bfc44bf91e84dea3c5e83add9e52078cb96e..8d3ede260e58455fc20d8d2286c5f05ead5e416f 100755
--- a/ios/Classes/Boost/FLB2FlutterProvider.h
+++ b/ios/Classes/Boost/FLB2FlutterProvider.h
@@ -37,5 +37,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)pause;
 - (void)resume;
 - (void)inactive;
+- (void)didEnterBackground;
+- (void)willEnterForeground;
 @end
 NS_ASSUME_NONNULL_END